test.html:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
这是test窗口(顶级窗口)<br />
<iframe src="index.html" width="500px" height="500px"></iframe>
</body>
</html>
index.html:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
</head>
<body>
这是index窗口
<script>
function setTop(){
if (window.top != window.self){
window.top.location = window.self.location;
}
}
</script>
<input type="button"
value="如果当前窗口不是顶级窗口的话,将当前窗口设置为顶级窗口"
onclick="setTop()" />
</body>
</html>
点击按钮: